Aqua-Base ESW 901 - 3- DESCRIPTION; 3.1 - WATER SYSTEM - FLOW CHART

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3 – DESCRIPTION
3.1 – WATER SYSTEM – FLOW CHART
In the basic version, desalinator ESW is made up of the following elements:
REP. DESCRIPTION FUNCTION
EdM
Hull fitting
:
Minimal
Ø3/4"
Always immerse
d
in seawater,
it ensures continuous seawater feeding of the unit
.
Not included in the
supplies.Do not take water from the motor’s cooling system. Place the hull valve (V0) as far away as possible
from the rejected brine hull fitting (R).
V0
Hull valve
Situated near th
e hull fitting, it ensures the closing of the seawater intake
.
Not included in the
supplies
.
A1/A2/A5
/B1/B2
Feeding pipes
Ensures water supply
to the unit through the filter
(4).
The
internal dia
meter
must be
20 (Embedded steel
spirale
reinforcement A1/A2/A5) and internal diameter 19 (flexible B1/B2).
1 Inlet valve
Manual 3
-
way
valve e
nsuring wa
ter s
upp
ly to the un
it
,
whether
with seawater in n
ormal
operation
, or with the water or
chemical solution contained in a bucket during cleaning or preservation of the membrane.
2
Sea Strainer
Small screen filter ensuring seawater filtering of la
rge partic
les t
o p
rotect the b
ooster pump (LP).
28 Vaccum switch
Lack of seawater
safety
of the
low
-
pressure
pum
p
inlet
(setting at
-
0.6
bar).
If the pump cavitation become
s too important
the unit is stopped to avoid damage to the mechanical and paddles pump.
3
Lo
w Pre
ssu
re Pump
Driv
en by an electric motor, it ra
ises seawater pressure to the required value between
5 / 10bar
.
Must be installed 200mm
below the water line.
4
5 µ filter
Contains a filter cartridge ensuring seawater filtering of particles gre
ater than
5µ (e
sse
ntial before
water enters the
membrane).
5
LP Pressure Gauge
Indicates the LP pressure.
6
Hyd
raulic amplifier
Increases seawater pressure to produce fres
h water through the R/O membrane
.
7
Air bleed valve
To bleed the system at the fir
st start
-
u
p, or
af
ter replacem
ent of the filters. Allows ope
ration of the unit at low pressure when
opened for cleaning or preservation operations.
8
Check valve
Allows dis
charging the excess
of
high pressure
when
changing the
operating parameters
(settin
g at 68 ba
r).
9
H
P Pressure G
auge
Indicates the HP pressure
.
10
R/O module
Made up of pressure
-
resistant vessel
s, containing the membrane
through
which the desalination of
seawater is carried out.
11 Cleaning valve
By opening this valve, the valve (1) i
tself bein
g tur
ned
to
cleaning
position, the unit can be ope
rated in
closed circuit on an
auxiliary tank (or bucket) containing the cleaning solution.
14 Valve 3-way
Electr
omagnetic 3
-
way valve controlled by the salinity cell. It automatically directs the
produced
water
to
wards the ta
nks if
the salinity is correct, or towards the discharge to the sea, if it isn’t.
15 Activated carbon
filter
(Extra)
For de
-
chlorination of fr
esh rinsing water to preserve the membrane.
17
Salinity cell
Continuously measures
the salin
ity o
f t
he produced
water, and controls the valve
(14) according to this measurement.
18
Electrovalve
of
rinsing
(Extra)
Ensures automatic rinsing of the desalina
tor by using fresh water from the boat’s water circuit under pressure.
B3
Reject p
iping
Coll
ects
the
concentrate
d brine produced by the membra
ne for discharge to the sea.
Imperative internal diam
eter must
be 19.
C1 Vaccum switch fitting
Checking of the p
ressure
at the inlet of
booster pump (red hose 4x6).
R Hull fitting
Situated above
the water
line
, e
nsures brine
discharge to the sea.
Not inc
luded in the supplies (avoid installing the
reject fitting in front of the seawater entry hull fitting).
A3 / B4
Cleaning pipe
Ensures supply of fresh water and chemical solutions stored in a buc
ket or a h
oldin
g t
ank, during
membrane cleaning
and
storage operations. Ensures the cleaning of the membranes in a closed loop by opening the valve 11. Imperative internal
diameter must be 20 (Embedded steel spirale reinforcement A3) and internal diameter must be 19 (flexible B4).
A4 / A6 Rinsing pipe
Ensures su
pply of fresh water from the fresh water tank, during
membranes
rinsing
operation
s
after automat
ic turning of the
rinsing electrovalve (18). Internal diameter must be 20 (Embedded steel spirale reinforcement.